<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Check that device-aspect-ratio warns about U+000C before/after slash in value</title>
<link href='foo' media='screen and (device-aspect-ratio: 16/9)' rel='stylesheet'><!-- U+000C before & after slash -->
</head>
<body>
<p>screen and (device-aspect-ratio: 16 / 9)</p>
</body>
</html>
